Difference between revisions of "PSP"

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m (Fixed the link to the uClinux PSP port)
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== External Links ==
 
== External Links ==
* [http://http://df38.dot5hosting.com/~remember/chris/  PSP port of uClinux]
+
* [http://df38.dot5hosting.com/~remember/chris/  PSP port of uClinux]
 
* [http://www.extremetech.com/article2/0,,1639233,00.asp Sony Details PSP Chip Specs]
 
* [http://www.extremetech.com/article2/0,,1639233,00.asp Sony Details PSP Chip Specs]
 
* [http://playstation.about.com/od/psp/a/PSPSpecs.htm PSP Specs]
 
* [http://playstation.about.com/od/psp/a/PSPSpecs.htm PSP Specs]

Revision as of 16:02, 15 June 2007

Some basic specs of the PSP:

  • two MIPS32R2 cores with no TLB
  • 128bit Bus
  • 1 - 333MHz @ 1.2V (currently capped at 222MHz (The 222MHZ cap is software based and lies in the executed files, it is not firmware based so is easily bypassed))
  • Main Memory: 32MB, 4MB eDRAM
  • Bus Bandwidth: 2.6GB/sec
  • I-Cache, D-Cache
  • FPU, VFPU (Vector Unit) @ 2.6GFlops
  • 3D-CG Extended Instructions

The description should be taken with a grain of salt. For instance, even the CPU core is not clear - maybe it is MIPS 4KE, but maybe 24K... The Coprocessor seems to be totally custom.

Lack of MMU makes this machine pretty much worthless except as a toy - which is what it was devised for, after all.

Linux support

Since the PSP's Allegrex CPU has no mmu, only uClinux variety kernels can be run on it. A mipsnommu branch of uClinux 2.4.19 has been ported to the PSP and is available at http://df38.dot5hosting.com/~remember/chris/

External Links